Ag Leader Versa DirectCommand Stepper Seed Control Reference Guides
Stepper Seed Control
To create a conguration, make the following button presses to start the Conguration
Wizard and then follow the instructions given on the display.
Enter Settings
Conguration Product
Planting
Press to Highlight Conguration
8360,1770,3dr
Planting
Start of Conguration Wizard
maximum RPM of the seed meter.
The number of times the hydraulic drive sprocket
turns to achieve 1 revolution of the seed meter.
Use the formula in the examples on page 2 to
calculate Gear Ratio. Carry the decimal to the
nearest 0.0001.
The planter will plant at this simulated ground
speed, until displayed ground speed is above
this value. Planting at the minimum ground
speed will occur when any of the following
conditions are met:
a) Ground speed is less than the above setting
b) Wheel motion is detected. Requires wheel
motion sensor
c) Jump start switch is depressed. Requires
jump start switch kit
Quick Reference Guide
2006003-ENG Rev A
1
Stepper Seed Control
Calculating Gear Ratio
Planter Drive Shaft
Sprocket (Drive)
19-tooth sprocket
Seed Rate
Motor (Drive)
18-tooth
sprocket
Drive
Ratio 1
Planter Drive Shaft
Sprocket (Driven)
29-tooth sprocket
Figure 1: Calculating gear ratio of chain drive meters.
Seed Rate Motor
(Drive) 18 Tooth
Sprocket
29 28 812
18 19 342
Driven/Drive 1 X Driven/Drive 2 = Gear Ratio
Drive
Ratio 2
X
Planter Drive Shaft
Sprocket (Driven)
28-tooth sprocket
29 28 812
18 19 342
Driven/Drive 1 X Driven/Drive 2 = Gear Ratio
Planter Drive
Sprocket
Seed Rate
Motor
X
Seed Meter
Shaft
X
Planter Drive
Shaft
2.3743
==
Gear Ratio
=
2.3743
==
Seed Meter
Shaft
X
Planter Drive
Shaft
Drive Ratio 2
Gear Ratio
=
Planter Drive Shaft
Sprocket (Driven/
Output) 28 Tooth
Sprocket
Drive
Ratio
1
Planter Drive
Sprocket
Seed Rate
Planter Drive
Shaft Sprocket
(Drive/Input) 19
Tooth Sprocket
Motor
Drive Ratio 2
Planter Brand Driven Drive
Planter Drive
Figure 2: Calculating gear ratio of shaft drive meters.
If determining shaft ratios for any shaft not listed in the table above, rotate input shaft (driver) 10 times. Count how many
times the output (driven) shaft turns. Divide number of turns of the input shaft by the number of turns of the output shaft.
Shaft Sprocket
(Driven) 29 Tooth
Sprocket
Case IH Planters 2 1
John Deere Planters 3 2
White Planters 11 5
Note: These values are for the shaft only. Drive/Driven
value between the Seed Rate Motor and Planter
Drive Sprocket must still be determined.
Divide number of turns of the input shaft by the number of turns of the output shaft.
Quick Reference Guide
2006003-ENG Rev A
input shaft revolutions
output shaft revolutions
2
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